/*
 * Copyright 2010 David de Mingo
 * 
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License. You may obtain a copy of
 * the License at
 * 
 * http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations under
 * the License.
 */

package org.shalma.client.view;

import java.util.HashMap;
import java.util.Map;

import org.shalma.internal.client.view.adapter.LongAdapter;
import org.shalma.internal.client.view.adapter.StringAdapter;

import com.google.gwt.user.client.ui.Label;
import com.google.gwt.user.client.ui.Widget;

public class AdapterRegistry {

	private Map<String, Adapter<?>> views;

	public static AdapterRegistry instance = new AdapterRegistry();

	private AdapterRegistry() {

		views = new HashMap<String, Adapter<?>>();

		addView(new LongAdapter(), new StringAdapter());
	}

	public Adapter getView(String type) {
		Adapter<?> view = views.get(type);
		return view != null ? view : new DefaultView<Object>();
	}

	private void addView(Adapter<?>... views) {

		for (Adapter<?> view : views)
			this.views.put(view.getType(), view);
	}

	private static class DefaultView<Object> implements Adapter<Object> {

		@Override
		public String getType() {
			return "";
		}

		@Override
		public Widget read(Object object) {
			return new Label("Unknow type");
		}

		@Override
		public Widget edit(Object object) {
			return new Label("Unknow type");
		}
	}
}
